Option to use grouped nodes everywhere

Seems to work okay, but I'm not happy with and of the options. So I'm
going to look into doing something else before the next release.

include/boost/unordered/detail/map.hpp

@@ -23,7 +23,11 @@ template <typename A, typename K, typename M, typename H, typename P> struct map
     typedef boost::unordered::detail::allocator_traits<value_allocator>
         value_allocator_traits;
 
+#if BOOST_UNORDERED_INTEROPERABLE_NODES != 2
     typedef boost::unordered::detail::pick_node<A, value_type> pick;
+#else
+    typedef boost::unordered::detail::pick_grouped_node<A, value_type> pick;
+#endif
     typedef typename pick::node node;
     typedef typename pick::bucket bucket;
     typedef typename pick::link_pointer link_pointer;
@@ -65,10 +69,10 @@ struct multimap
     typedef boost::unordered::detail::allocator_traits<value_allocator>
         value_allocator_traits;
 
-#if BOOST_UNORDERED_INTEROPERABLE_NODES
-    typedef boost::unordered::detail::pick_node<A, value_type> pick;
-#else
+#if BOOST_UNORDERED_INTEROPERABLE_NODES != 1
     typedef boost::unordered::detail::pick_grouped_node<A, value_type> pick;
+#else
+    typedef boost::unordered::detail::pick_node<A, value_type> pick;
 #endif
     typedef typename pick::node node;
     typedef typename pick::bucket bucket;